Earbud



FIG. 1. is a front perspective view of an earbud, showing the new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is the opposite side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

In all figures, the broken lines represent environmental subject matter that forms no part of the claimed design. 

CLAIM The ornamental design for an earbud, as shown and described. 